1. Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea.
2. Computing Platform Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea.
3. Department of Electrical and Computer Engineering, Seoul National University (SNU), Seoul 08826, Korea.
4. Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA.